Add logs when stun or turn host lookup is completed.

webrtc/p2p/base/stunport.cc

Index: webrtc/p2p/base/stunport.cc
diff --git a/webrtc/p2p/base/stunport.cc b/webrtc/p2p/base/stunport.cc
index 13ecca4a3a1cb90b2640e45ebee708d47cc2bf37..7b9ffca169dc1f6176c8eef9a52f333e380a350b 100644
--- a/webrtc/p2p/base/stunport.cc
+++ b/webrtc/p2p/base/stunport.cc
@@ -372,12 +372,11 @@ void UDPPort::ResolveStunAddress(const rtc::SocketAddress& stun_addr) {
 void UDPPort::OnResolveResult(const rtc::SocketAddress& input,
                               int error) {
   ASSERT(resolver_.get() != NULL);
+  LOG_J(LS_INFO, this) << "STUN host lookup result " << error;

[pthatcher1, 2015/12/02 19:56:32]

I think that what we really want is a log just *before* we do the lookup. 
Otherwise, we wouldn't see anything in the logs for ones that take a really long
time.

And in that case, we probably only want to log failures, not successes.

[honghaiz3, 2015/12/02 23:45:30]

Done.

 
   rtc::SocketAddress resolved;
   if (error != 0 ||
       !resolver_->GetResolvedAddress(input, ip().family(), &resolved))  {
-    LOG_J(LS_WARNING, this) << "StunPort: stun host lookup received error "
-                            << error;
     OnStunBindingOrResolveRequestFailed(input);
     return;
   }